public void Only_new_files_exists()
        {
            CreateLogFile(new DateTime(2008, 9, 10), "The content 1");
            CreateLogFile(new DateTime(2008, 9, 9), "The content 2");
            CreateLogFile(new DateTime(2008, 9, 8), "The content 3");

            _trigger.Trig();

            _fileSystem.AssertFileList(
                LOG_DIR + "20080908-MyApp-MyLog.MyExt",
                LOG_DIR + "20080909-MyApp-MyLog.MyExt",
                LOG_DIR + "20080910-MyApp-MyLog.MyExt");
        }